Ventilating-valve.



M. MURPHY.

VENTILATING VALVE.

APPLIGATION FILED Nov. z3, 1912.

Patented July 29, 1913.

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WJTNESSES 0]l'0 LL'pZLI//NVENTOR MORTON MURPHY, 0F JANESVILLE, WISCONSIN.

VENTILATING-VALVE.

Specification of Letters Patent.

Patented July 29, 1913.

Original application filed February 14, 1912, Serial No. 677,408. Divided and this application :filed November 23, 1912.

Serial No. 733,190.

of Wisconsin, have invented cert-ain new` and useful Improvements in Ventilating Valves, of which the following is a specifii cation, reference being had therein to the accompanying drawing.

This invention relates to valves to be used in connection with fireless cook stoves or cookersV and thel like, and has particularly for its object the production of aV simple mechanism which may be easily cleaned and which will not be likely to become corroded.

Anotherobject of this invent-ion is the production of an eicient valve cap which may be removed from the valve stem in orderthat the stem may be cleaned as well as the valve cap therefor.

This application is a divisional application from my previousapplication relating to a valve for reless cooker, iiled February 14, 1912, and bearing Serial No. 677 ,408.

A still further object of this invention is the production of a simple and eflicient valve cap formed from a blank sheet of material which may be adjusted vertically upon the valve stem to control the exhaust of the steam or heat from the interior of the well of the tireless cook stove or cooker.

With these and other objects in view, this invention consists of certain novel constructions, combinations and arrangements of parts, as will be hereinafter fully described and claimed.

In the drawings :-Figure 1 is a trans-` verse section through the top of the tireless cooker or cook stove showing the valve in connection therewith. Fig. 2 is a vertical sectional view through the valve mechanism showing the cap in its lnormal position upon the valve stem. Fig. 3 is a vertical sectional view through the valve mechanism showing the valve cap drawn to an adjusted position for allowing the escape of heat or steam from the interior of the well of thev tireless cooker. Fig. 4 is a'view of the blank from which the valve cap is formed. Fig. 5 is an enlarged sectional view through the valve cap detached from the valve stem. Fig. 6 is an enlarged sectional view taken on line 6-6 of Fig. 1.

By referring to the drawings by numerals,

it will be seen thatl designates the top of the tireless cook stove which is provided with an opening 2 within which opening is seated the basin 3. This basin 3 is provided with a circumferential rim 4L which rests upon the upper face of the top of the cook stove. The basin 3 is provided with a centrally located aperture 4a through which aperture passes a stem or body 5 which is formed of a tubular structure. This stem is provided with a reduced lower end for con stituting a reduced collar 6 which collar engages the inner lining 7 of the cook stove or cooker thereby constituting an eliicient support for the stem 5. The stem 5 projects well within the basin 3 as indicated in Figs. 2 and 3 so as to constitute an upwardly extending end 8 which end is slightly rounded upon its upper edge as indicated at 9 for facilitating the placing of the valve cap thereon. A valve cap 10 is placed upon the upper end of thestem 5 and is formed from a blank sheetof material as indicated in Fig. 1. By forming the valve cap of sheet metal as described, it will be understood that a very efficient device has been produced which may be very cheaply manufactured. This blank is bent to form a pair of gripping jaws 1 1 which straddle the pipe or stem 5 of the valve mechanism and hold the cap 10 upon the stem 5. The cap 10 is also provided with a pair of inwardly curved lips 12 which lips engage the upper end of the tubular body or stem 5 and limit the downward movement of the cap 10 upon the stem 5. These inwardly curved lips 12 are formed so as to terminate short of the lower edge of the valve cap 10 thereby facilitating the sliding of the valve for the desired distance upon the valve stem 5. Through the medium of these lips 12 it will be understood that, it will not be necessary to adjust the cap 10 upon the tubular body or stem 5 under ordinary circumstances to cause the valve to operate eficiently for these lips will act as a stop and support the cap in its adjusted position. When, however, it is desired to force the cap firmly upon the stem 5, additional pressure will have to be brought to bear upondthe cap forcing the lower edge of the jaws 11 in engagement with the inner edge of the basin 3 as is illustratedy in Fig. 2.

A ball 13 is used in connection with the valve and normally rests upon the upper edge 9 of the tubular body or stem 5 for closing the passage therethrough. This ball has vertical movement within the enlarged, pocket 14 formed in the upper end of the cap and this pocket is formed lo-ng enough to allow the ball to have sutlicient vertical movement within the pocket after the cap l0 has been forced down upon the stem 5 as to allow the escape of the steam or otheraccumulated vapors from the 'well ofthe 'tireless cooker or cook stove through the bodv.

o-f stem 5. The lips 11 are so bent as to at all times engage the lball 13 when the ball is forced near 4the lower end of the cap, thereby preventing the ball 13 from becoming 'accide'ntally dropped from the cap 10. It should, of course, be understood that both end of the valve stem 5 and through the openings l5 formed between the lips 11 and v 12. The cap 10 lvmay be adjusted to difterent positions upon the'upper end of the stem 5 so as to regulate the vertical movement of the ball 13 within the cap 10. `When Y the cook stove or cooker is being used forbaking or roast-ing, the cap is very slightly raised so as to allow the ball to have quite` a. movement within the cap, whereas while the cooker is used for boiling purposes the"- cap is forced down upon the upper end of the stem to only V'allow a slight movement of f the ball 13 within the pocket 14 of the;

- :tube-engaging portion adapted to tit snugly From Ithe foregoingdescription it will ybe;` seen that a very simple andeiiicientval-ve has* been produced which will be so operated yias to allow the valve'cap to be removed from lthe stem to be easily cleaned provided 'the1 cap 10.

same should become corroded.

a'dry, or practically dry heat necessary 'for baking and roasting', 'also a safety valve which will prevent the steamipressure inthe compartment or oven lof'the itireless cooker or cook stove from reaching 'a pointofldanger. In view of the fact that the Vvalve is s'o placed within the basin 3 as to beshielded `by vthe "upper edge thereof, willb'e further obvious 'that I thave provided a "`1'ir`eless cookstove or cooker in such a way that the cookers may. be stacked conveniently without the removal of any of the parts of the Ventilating valve.

It will be seen by carefully considering the drawing that the gripping aws are provided with laterally extending feet, the feet of one jaw extending toward the feet of the 'other jaw thereby constituting a substantially circular bottom for the cap for facilitating the insertion of the cap upon 'the `upper end of the `stem or tubular body or esca-pement tube `5. These ylater-ally extending feet 1G also constitute a means for protect-ing the 'lower end of'fthe tongues 12 in so far Aas these feet constitute la shield therefor.

Having thus described the invent-ion, what is claimed as new, is

il. A valve ofthe lcla-ss "described comp-rising a tubular lbody portion, a detachablecap carried by the upper end of said body portion, said ycap being formed from a blank sheet of material and provided with'a pair of gripping jaws, la pair of stop lips positioned 'between saidgripping jaws and at jright angles thereto forlimiting the v downward movement o'f said cap upon said ztu- -bular portion, and saidgripping jaws being adapted to tirmlyigrip the upper -endcf said 'tubular body portion for preventing the accidental removal-of saidca'p ifrom said tubu- `around said escapement tube for holding said cap upon said tube, a spring tongue Vformed upon `each side-of said `cap andengaging said 'esoapement tube for resisting Athe downward movement of said cap -upon i said escapement 'tube and l constituting `a 'ball It should be vfurther obvious that 'I have?y provided a valve for -a tireless cooker -orj cook stove for automatically removing thet excess gas or vapors 'from the compartmentE or'ove'n of the tireless'cook stovethereby'pre-g venting the ste'ainorinoisture from leaking, out around the sides oredgesof the 'cooker or cook stove. IA have also provided an etli-` cient xvalve which may be adjusted to lett the steam out'of the compartment-or'ovenof the tireless cook Astove thereby producing container for said cap, and a ball carried by said escapement tube and held within Isaid cap and capable :of :ha-'ving longitudinal moi'f'ement relativ'eithereto.

3. A valve for a tireless Vcooker of the Aclass described comprising a basin, an -e's- 'capement rtube lsecured tojsaid basin l.and extending upwardly thereon, a valvecap positioned upon the upper endfof said escape- 'ment tube and adapted Vto be Vnormally Lshielded within saidbas'in, said; 'cap compris- 'in'gfan yenlarged head provided with in- 'wardly bowed gripping jaws, laterally 'ex- Etending i'viden'ed ends being 'bent "to extend toward each other and constituting a substantially vvcircular base for said cap, inwardfly-bowedlips interposed between "said gripping jaws and terminating short-ofthe lower fe'nds thereof adaptedito =constitutemeans for "resisting the inward @movement of said Ilil() "ISO cap upon said escapement tube, said cap provided with an enlarged head, and a ball positioned within said enlarged head and adapted to move vertically therein, and said inwardly bowed lips adapted to prevent said ball from becoming actually removed from said cap.

4. A valve of the class described comprising an elongated escapement tube, a cap carried by said escapement tube and adjustably mounted thereon, said cap provided with a widened head, a tube engaging portion, said tube engaging portion adapted to t snugly around said escapement tube for holding said cap upon said tube, spring tongues formed upon said body and engaging said escapement tube for resisting the down- -ward movement of said cap upon said escapement tube and const-ituting a ball container for said cap, a ball carried by said 20 escapement tube and held within said widened head, said widened head adapted to facilitate the passing of the ball to one side of said head for permitting the free passage of steam through said valve casing, and said 525 elongated escapement tube being provided with rounded upper ends for acilitatingthe placing of said valve cap thereon.

In testimony whereof I hereunto aiiX my i Copies of this patent may be obtained for ive cents each, by addressing the Commissioner of '.Patents, Washington, D. C. 

